MySQL Handler

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MySql.Data;
using MySql.Data.MySqlClient;

public class MySQLHandler
{
    public MySQLHandler()
    {
    }

    private MySqlConnection connection = null;
    public MySqlConnection Connection
    {
        get { return connection; }
    }
    private static MySQLHandler _instance = null;
    public static MySQLHandler Instance()
    {
        if (_instance == null)
            _instance = new MySQLHandler();
       return _instance;
    }

    public bool IsConnect()
    {
        bool result = true;
        try {
            if (Connection == null)
            {
                if (String.IsNullOrEmpty(ServerSettings.SQL_AUTHDB))
                    result = false;

                MySqlConnectionStringBuilder conn_string = new MySqlConnectionStringBuilder();
                conn_string.Server = ServerSettings.SQL_HOST;
                conn_string.UserID = ServerSettings.SQL_USER;
                conn_string.Password = ServerSettings.SQL_PASS;
                conn_string.Database = ServerSettings.SQL_AUTHDB;
                connection = new MySqlConnection(conn_string.ToString());

                Log("Connecting to MySQL: " + ServerSettings.SQL_HOST + ", " + ServerSettings.SQL_USER);
                connection.StateChange += Connection_StateChange;

                connection.Open();

                result = true;
            }
        }
        catch (Exception e)
        {
            Log(e.Message + "\r\n" + e.StackTrace);
        }

        return result;
    }

    private void Connection_StateChange(object sender, System.Data.StateChangeEventArgs e)
    {
        if (e.CurrentState == System.Data.ConnectionState.Open)
        {
            Log("Connected to MySQL: " + ServerSettings.SQL_HOST);
        }
        if (e.CurrentState == System.Data.ConnectionState.Closed)
        {
            //Log("Closed Connection to MySQL: " + ServerSettings.SQL_HOST);
        }
        //throw new NotImplementedException();
    }

    public void Close()
    {
        try {
            connection.Close();
        }
        catch (Exception e)
        {
            Log(e.Message + "\r\n" + e.StackTrace);
        }
    }

    private void Log(string message)
    {
        Console.WriteLine(message);
        WriteToLog.Log(message, "LOG");
    }
}